People Search Returns no Results on https

This is a simple one (hopefully).
The SSP3 protocol is used when defining the content sources for the SSP

For example

sps3://mysite.yourdomain.com/

sps3://www.yourdomain.com/mysite/

sps3://my.yourdomain.com/

If you are using SSL on your My Site host header, the SPS3S protocol should be used instead instead.

For example

sps3s://mysite.yourdomain.com/

After you’ve updated the content source, run a full crawl and you should now have people results!